Electric condenser



Jan. 5, 1926. 1,568,918

E. PFIFFNER ELECTRIC commnssn Filed March 19, 1923 .277 VvzZTo/ ff ZFP EMIL PFIFFIJ ELECTRIC GQIEDEHSEE.

Application filed March 1% 1923.

$0 all whom it may; 0011631)?! Be it known the 1 citizen of the Republic oi Switzerland, re-

siding atl rybourg, Switzerland, have vented certain new and useful lmprorements in Electric Condensers (i'o which i have filed an application for patent Germany, Feb. 10, 1922), of which the lowing is a specification.

in "lol- This invention relates to an electric condenser consisting of superimposed and parallel connected part-condensers in any sired arrangement.

The essential feature of the condenser ac cording to the present inve' condensers, are disposed at least at coated margins at an increased distance e IilOli d in Q;

n 1 0111 Arpl-x.

order to weaken the electric at the margin from plate to plate.

on consists in that the plates, forming he individual par lll nrther according to the present invention insulating layers are arranged between the electrically connected metal-coatings of like polarity whereby it is a further characteristic that these layers posses a smaller dielectric constant than the condenser electric. A further feature consists in the insertion or provision of (llStzlllCQ-lllt)llll'lE'S,

that the spaces termed thereb -J coated margins may be til ed-up with insulating substance.

the

it is well known, that the metal coating oi electric condensers has to be in an timate contact 'ith the surface oi the lil- (ilductivity has to be avoided.

If this condition has been satisfied "tor the individual plates ot a, condenser. tor instance by plai mg the metal coatings by means cl a. high pressure or av chemical precipitation or other means into intin'iate contact w th individual insulating plates. the result any the in tended to be attained by these precautions may he still disturbed by the conditions the margin ot the coatings; this being particularly the case with thin insulating layers.

'0 L ed in section condenser plates arged scale.

In all figures the llOlllOlIiOlill coati s which are electrically connected with another, are designated by +(pos1tivcl -(neg at1ve) marks respectively.

The drawing illustrates diagraniniatically no and Serial No. 626,151.

possess a high space l: with air or with an insnl 1 Now it the plates 1 and 2 dielectric constant and th medium in at a smaller dielectric constan and further also a smaller zilisruptir generally the case th. be ea ily pierced and at that i are "Formed on the snrtace of which will gradually heat and structure of the insulating ina- J t e plate 2, until the break through is started between the bottom positive and negative coatings and the condenser is punctured.

However on providing a space filled with a suitable insulating m dium and establishing a certain distance between the margins of the plates 1 and 2, or on inserting an insulating plate according to Fig. 2 between the two metal. coatings of the same polarity, the passage or way of the electric field lines will be increased and therefore the field will be weakened, this being the more if the dielectric constant of the introduced 1ne diuin or plate 5 is small. The necessary strength (thickness) of the intermediate layer may be easily determined by calc'ulation.

Fig. 3 illustrates the same arrangement, but with the plate-margins displaced with respect to each other or with an insulating margin of unlike width. In this arrangement the field extends between the bottom coating of the plate 1 and the top coating of the plate 2.

Fig. lillustrates a modified arrangement provided with an interposed insulat ng. plate The insulating plate Ina be replaced by a distance member 6, which cruisists m a conducting material if it does not proicc beyond the coatings and of an insulat mater al if it projects beyond the margin. so that the said material will fill the space in place of the plate 5.

The described construction for condensers consisting of several no is applicable arranged in any desired manner, for in stance, fiat, rolled, folded and so forth.

I claim z- 1. An electric condenser consisting of superimposed and parallel connected partcondensers including dielectrics and metal coatings, the metal coating of each dielectric being in intimate contact with the dielectric and the coatings of like polarity facing each other,varying in length and arranged a distance apart at least at the margin of the condenser to increase the path between the coatings of unlike polarity atthe margins of the condenser.

2. An electric condenser (:(msisting of superimposed and parallel connected partcondensers including dielectrics and metal. coatings, the metal coating of each dielectric being in intimate contact with the dielectric and the metal coatings of like polarity facing one another, varying in length and arranged a distance apart at least at the margin of the condenser to increase the path between the coatings of unlike polarity at the margins of the condenser and being electrically connected with each other, and an insulating layer interposed between the metal coatings of like polarity adapted to protect the margins of the coatings which do not exactly cover-up each other.

3. An electric condenser consisting of superimposed and parallel connected part condensers including dielectrics and metal coatings, the metal coating of each dielectric being in intimate contact with the dielectric and the metal coatings of like polarity facing one another, varying in length and arranged a distance apart at least at the margin of the condenser to increase the path between the coatings of unlike polarity at the margins of the condenser and being electrically connected with each other, and an insulating layer of a material. having a smaller dielectric constant than the condenser dielectric interposed between the mctal coatings of like polarity.

4. An electric condenser consisting of superimposed and parallel connected partcondensers including dielectrics and metal coatings, the metal coating of each dielectric being in intimate contact with the dielectric and the metal coatings of like polarity facing one another, varying in length and arranged a distance apart at least at the margin of the condenser to increase the path between the coatings of unlike polarity at the margins of the condenser, and a distance member disposed between the coated part-condensers in such a manner that the space is filled-u with an insulating mass at the margins of the coatings.

5. An electric condenser consisting of superimposed and parallel connected partcondensers dielectric and metal coatings, the metal coating of each dielectric being in intimate contact with the dielectric and the metal coatings of like polarity facing one another, varying in length and arranged a distance apart at least at the margin of the condenser to increase the path between the coatings of unlike polarity at the margins of the condenser, and distance members disposed between the coated part-condensers in such a manner that the space is filled-up with an insulating mass at the margins of the coatings.

In testimony whereof I hereunto affix my signature.

EMIL PFIFFNER. 

